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How about John Travolta's 707?
I was thinking mainly about aircraft that earn their keep carrying passengers or cargo (or indeed both) rather than preserved ones.
Are there any other preserved flying jets in private hands, apart from for John Travolta's? i can't readily think of any.
25 airlines flying oldest planes in the world - Rediff.com Business
That website looks very American, so I suppose that, as with a lot of things, they believe "the world" = USA / North America at a push!